Hamilton ruddick



(ModeL) 2 Sheets-Sheet 1.

4 H. RUDDIOK.

RECORDING DYNAMOMETER.

N0. 248,612. Patented 001. 25,1881.

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(ModeL) 2 Sheets-Sheet 2.

H. RUDDIGK.

RECORDING DYNAMOMETER.

No. 248,612. v Patented Oct. 25,1881.

Darren STATES PATENT Qrrrcna HAMILTON RUDDIOK, OF BROOKLYN, ASSIGNOR TO THE TRANSMITTING DYNAMOMETER COMPANY, OF NEW? YORK, N. Y.

RECORDING-DYNAMOMETER.

SPECIFICATION forming part of Letters Patent No. 248,612, dated October 25, 1881. Application filed November 8, 1880. (Model.)

To all whom it may concern Be it known that I, HAMILTON RUnmcK, of Brooklyn, in the county of Kings and State of New York, have invented an Improved Registering-Dynamometer, of which the following is a specification.

Figure l is a face view, partly in section, of my improved dynamometer. Fig. 2 is a vertical central section of the same. Fig. 3 is a back View thereof; and Fig. 4, a central section, on an enlarged scale, of the differential gearing used to move the dial-plate.

The object of this invention is to produce an attachment to shafts and pulleys, toothed Wheels, cranks, or other equivalent rotary machinery, for the purpose of measuring and at the same time recording the amount of power delivered by the shaft to the pulley, or by the pulley to the sh aft, so that upon inspecting the register and the record automatically made by my improved mechanism the amount of power actually used can at once'be ascertained.

The invention is intended to be applicable to all pulleys, gear-wheels, cranks, and the like, and may be readily attached to those already in use.

The invention consists, principally,in applying to the pulley, which we will adopt in this specification as the specif c device for this purpose, (although, when I say pulley, I wishit to be understood that I do not limit myself to the application of the invention to apulley,) a rotating dial-plate, which joins in the rotating movementof the pulley, but has anindependent rotation of its own, either slightly faster or slightly slower than that of the pulley itself, and in placing against said dial-plate a pencil or marking-tool, which is fitted into a jointed arm, capable of vibratory movement, in such a manner that the variations of pressure imparted to a spring or set of springs by an arm or arms transmittingthe movement of the shaft to the pulley, or vice versa, will control the movements of said pencil-holder and cause it to mark on the dial-plate the varying positions of said pencil. The pencil-holder revolves with the pulley. The dial-plate, however, has, as already stated, a certain independent movement, and by the differential speed between the pencil-holder and the dial-plate I am enabled to make progressive lines on the dial plate, which show the variations of power transmitted from time to time.

The invention also consists in various details of improvement in the mechanism employed, which are hereinafter more fully specified.

In the accompanying drawings, the letter A represents the driving-shaft. Upon this drivin g-shaft is keyed or otherwise securely fastened an arm, B, or a series of arms B, which project radially from the shaft. Instead of these radial arms B, a suitable wheel or pulley may be employed for the samepurpose to which these arms are put, as hereinafter specified.

G is the pulley which is to be driven by the shaft A. This pulley is loose on the shaft A, and derives its motion by means of the aforementioned arms 13, which press against springs D, that are interposed between said armsB and projections E E of the pulley, as clearly shown in Fig. 1.

In Fig. l the arrowsindicate the direction in which the shaft revolves the pulley; and it will be readily seen, from what has already been stated, that the more power there is required from the pnlley-or, in other words, the more resistance it offers to the shaft--the more fully will the springs D D be compressed, and that the less resistance there is the less will said springs be compressed. Thus it also follows that during the revolution of the shaft A, if there be varying power transmitted by the machinery which connects with the pulley, there will also be varyingdistances between the arms B B. This variation of distancesis taken advantage of by me for moving the recordingpencil F, which is a suitable style or markingtool set into alever, G, which lever at a is pivoted to one of the arms B, and at d jointed to the pulley or any projection thereof. As the pulley is revolved, if there be varying degrees of power transmitted, there will be a corre-. sponding vibration of the lever G, and the pencil or marking-tool F will thus be moved, from time to time, nearer to or farther away from the shaft A.

In the position shown in Fig. l the springs D are supposed to be expanded, and no resistance is supposed to be on the pulley, and the pencil is therefore in the zero position over a dial-plate, H, which dial-plate surrounds the shaft Aconcentrically, and is marked with con-- centric rings to show the various degrees of power. The more power there is used the nearer, under the arrangement shown, will the pencil be brought to the shaft and make its mark on the inner series of circles. The less power is used the greater will be the distance between thepcncil and the shaft, and the marks will been the outer series of circles.

The dial-plate H, which maybe a paper disk, is fitted upon asupporting-disk, I, which loosely surrounds the hub of the pulley or the shaft itself, and which disk I has a toothed edge, as clearlyshowninthedrawings. Intothistoothed edge meshes a pinion, b, the shaft 8 of which pinion carries likewise a larger toothed wheel, (I, and another loosely-fitted toothed wheel, 6. The wheels b and d are rigidly united, but are loose on the shaft 8. The wheel 0, however, is fast on the shafts. Into both of these two wheels d and e, which are of equal diameters, but of which one has one tooth more than the other, meshes another pinion,f, the stud of which projects from another toothed wheel, g, that is loose on the shaft 8 and placed next to a toothed wheel, k, that is fast on the shaft 8. The wheels 9 and h are of equal diameters, but one has one tooth more than the other. Into both wheels g and h meshes a pinion, t, the stud of which is hung in a ratchet-wheel, J, that is fitted loose upon the shafts. The shaft 8 is firmly secured upon a spoke of the pulley, and is not capable of turning on its axis. lis a pawl, which is hung onto a sliding rod, L, that extends through the rim of the pulley, and is pressed outward by a suitable spring, m. As the belt which is put around the pulley arrives over the outer projecting end of the bar L it presses it down or inward, and thereby moves the pawl I, so as to turn the ratchetwheel one tooth. The movement of the ratchet-wheel is transmitted to the wheel g by the pinion t' as it rolls around the fixed wheel h in such manner that for every rotation of the wheel J the wheel g is moved one tooth, owing to the difference between the number of teeth in the wheels 9 and h. Every rotation of the wheel g, in turn, causes the wheel (I to be turned one tooth, because the pinion f, in revolving around the fixed wheel 0, will cause this movement of one tooth to be produced, owing to the difference in the number of teeth of the wheels (I and e. The movement of the wheel dis by the pinion b transmitted to the wheel I and to the dial-plate, and for the purposes of this illustration the above-mentioned differential gearing has been so adjusted that the dial-plate H and its disk I will receive one independent revolution during about thirty-five days of constant revolution of the pulley.

The revolution of the dial-plate may either be very little faster or very little slower, in about the proportion indicated, than that of the pulley. ltis immaterial whether it be faster or slower, so long as there is an independent movement of the dial-plate in a given ratio to the movement of the pulley. By this independent motion of the dial-plate the pencil,

pressing upon it under the influence of a suitable spring, n, will make a continuous mark on said dial-plate, as indicated in Fig. 1, which continuous mark will show by its position in the inner or outer circles of the dial-plate the amount of power actually transmitted by the pulley.

I have described the mechanism thus far as being applied to the pulley when the pulley is to be driven by the shaft. The invention is equally applicable, and will work precisely as described, if the poweris transmitted from the pulley to the shaft, in which case, however, the direction of the rotation will be reversed, unless the pulley is reversed on the shaft.

The pa wl-bar L, if applied to a toothed wheel instead of a pulley, will obtain its reciprocating movement by contact with the opposite gear, and if applied to a crank by contact with a suitable stationary contrivance.

In order to adjust the tension of the springs D to a suitable zero position, I prefer to use an adjusting-screw, 0, which is shown in Fig. 3, and which extends through a lug, 1), that projeets from the hub of the arms B and bears upon another lug, 1, that projects from a part of the pulley. The farther the screw 0 is moved to increase the distance between the lugs p r the more will the springs D D be compressed, and thus the normal position of the said springs can be readily regulated; and it will be seen from the drawings that the pencil F is not shown on the outermost ring of the dial-plate, although there is no power applied to the pulley, because the screw 0 has been turned to reduce the distance between the arms B and E beyond what it would be in the normal position were it not for said screw 0.

Having thus described my invention, I desire it to be understood that I do not limit myself to the details of the mechanism here shown, nor to the number of wheels in the transmit ting-gear, nor to any special kind or construc tion of pencil, as many of said details and parts mentioned may be varied without departing from the spirit ofmy invention.

1 claim- 1. The automatically -registering rotating dynamometer which consists of the pencil-holder or markerF G, in combination with the rotary circular dial H, and with mechanism for vibratin g said pointer and forimparting independent slow rotation to said dial-plate within the rapidly-revolving carrying-wheel O, substantially as described.

2. In combination with the shaft A and its rotary projecting arm B, the loose pulley or wheel 0, spring or springs D, and the pencilholder G, which is connected to said arm B and to said pulley for marking the dial H, substantially as described. 7

3. The combination of the wheel or pulley O and its shaft A with the reciprocating pawlcarrying bar L, ratchet-wheel J, intermediate differential transmittin g-gear and loosetoothed wheel I, all arranged so that said wheel I will have a slow independent rotary movement imparted to it Within the rapidly-revolving wheel 0, substantially as described.

4. In a rotating dynamometer, the combination of the power-transmitting arm B, powerreeeiving arm E, and intervening spring, D, which bears directly against both said arms and with the adjusting-screw 0, all arranged so that by means of said screw the tension of the spring is regulated, substantially as described.

5. The recording rotary dynamometer consisting of the combination of the shaft A, its

arm B, and spring D, with the pulley or wheel 0, loose dial-plate H, reciprocating bar L, ratchetwheel J, intermediate transmittinggear to convey motion from the wheel J to the disk I, that carries the dial, and with the penoil-carrying bar G, which is connected to the arm B and to the pulley, substantially as described.

HAMILTON RUDDICK. Witnesses:

WILLY G. E. SCHULTZ, WILLIAM H. (3. SMITH. 

